The knee is still visibly swollen, but I can walk again. It's wonderful. I'm climbing very easy climbs. The danger is mostly the landing after being lowered by your belayer. I've got an attentive belayer, and he's been babying me, just as I need it right now.

I should write more about climbing and displaced patellas, because the conventional wisdom I've been getting from doctors doesn't exactly line up with my experience. Let me just say this, from anecdotal experience of someone who's been climbing for 10 years after having severely displaced his patella, and with a subsequent tendency to repeat the injury:

Climbing with deliberate, static moves is good exercise for strengthening the musculature around the patella.